Does shoprite understand what is warranty

In December 2015,I bought a 2 plate stove at Shoprite in hillbrow, when I switched it on the stove didn't get hot but it did switch on, I went back with it and I cant express the bad attitude and extremely intolerant rude behaviour that I obtained, can managers hire people who know at least something about customer service please, after a huge argument trying to explain to them that the stove is not doing what it was bought for, I then left the stove on the shop because they didn't want assist me, in that conversation all I could read was that you bought it so keep it even if its not working, I believe they sold it to another customer as I walked away with nothing and they still kept my money yet I was just asking them to look at it and see what the problem is as the only thing that I wanted was a proper working stove